What is the CVSS score of CVE-2021-39246?

CVE-2021-39246 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. EPSS exploitation probability: 0.5%.

Is there a public PoC exploit available for CVE-2021-39246?

Yes, a public proof-of-concept exploit is available for CVE-2021-39246. Prioritise patching immediately. EPSS: 0.5%.

Is there a patch available for CVE-2021-39246?

Yes, a patch is available for CVE-2021-39246. Update the affected software to the latest version immediately.

Tor Browser CVE-2021-39246

MEDIUM

Insertion of Sensitive Information into Log File (CWE-532)

2021-09-24 cve@mitre.org

Information Disclosure Tor Browser

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

CVE Published

Sep 24, 2021 - 19:15 nvd

MEDIUM 6.1

DescriptionNVD

Tor Browser through 10.5.6 and 11.x through 11.0a4 allows a correlation attack that can compromise the privacy of visits to v2 onion addresses. Exact timestamps of these onion-service visits are logged locally, and an attacker might be able to compare them to timestamp data collected by the destination server (or collected by a rogue site within the Tor network).

AnalysisAI

Tor Browser through 10.5.6 and 11.x through 11.0a4 allows a correlation attack that can compromise the privacy of visits to v2 onion addresses. Rated medium severity (CVSS 6.1), this vulnerability is no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-532. Tor Browser through 10.5.6 and 11.x through 11.0a4 allows a correlation attack that can compromise the privacy of visits to v2 onion addresses. Exact timestamps of these onion-service visits are logged locally, and an attacker might be able to compare them to timestamp data collected by the destination server (or collected by a rogue site within the Tor network). Affected products include: Torproject Tor Browser. Version information: through 10.5.6.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.